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Expired European patentEurope

Elliptic curve point octupling for weighted projective coordinates

EP 1705560 B1 · Applicant: MICROSOFT CORPORATION

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed March 15, 2006 and granted December 2, 2009. A European patent lasts at most 20 years from filing, so its term ended March 15, 2026.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledMarch 15, 2006
PublishedSeptember 27, 2006
GrantedDecember 2, 2009
Term endedMarch 15, 2026
Application numberEP 06111177
Classification (CPC)G06F7/725

Timeline

Timeline From EPO dates

2007200920112013201520172019202120232025Application filedMarch 15, 2006PublishedSep 27, 2006Patent grantedDec 2, 2009Term endedMarch 15, 2026

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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